LG Electronics AMNH123DEA0 (LMN120HE) Air Conditioner User Manual


 
72 Multi type Air Conditioner
Troubleshooting Guide
Error Code
Trouble Shooting
Error
Title Cause of error Check point & Normal condition
code
01 Indoor air sensor
02 Indoor inlet pipe sensor
06 Indoor outlet pipe sensor
Open / Short
Soldered poorly
Internal circuit error
Open / Short
Soldered poorly
Internal circuit error
Open / Short
Soldered poorly
Internal circuit error
Normal resistor : 10K /at25°C (Unplugged)
Normal voltage : 2.5Vdc / at 25°C (plugged)
Normal resistor : 5K/at25°C (Unplugged)
Normal voltage : 2.5Vdc / at 25°C (plugged)
Normal resistor : 5K/at25°C (Unplugged)
Normal voltage : 2.5Vdc / at 25°C (plugged)
10K
2.5Vdc
Check the resistance / voltage
V
Check Point
1. Unplug the sensor on Indoor unit PCB.
2. Estimate the resistance of each sensor
3. If the resistance of the sensor is 10K/5K at 25°C, then sensor is normal
4. If the resistance of the sensor is 0 K or , then sensor is abnormal. Change the sensor.
5. Plug the sensor on Indoor unit PCB and Power ON.
6. Estimate the voltage of each sensor.
7. If the voltage of the sensor is 2.5Vdc / at 25°C, then sensor is normal.
8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. Repair or Change the PCB